'Completion' in the Bible

and the enemy who has sowed it is the devil; and the harvest is the completion of the age, and the harvestmen are angels.

As then the darnel is gathered and is burned in the fire, thus it shall be in the completion of the age.

Thus shall it be in the completion of the age: the angels shall go forth and sever the wicked from the midst of the just,

And as he was sitting upon the mount of Olives the disciples came to him privately, saying, Tell us, when shall these things be, and what is the sign of thy coming and the completion of the age?

teaching them to observe all things whatsoever I have enjoined you. And behold, I am with you all the days, until the completion of the age.